Final answer:
The people at Pentecost were from different religions, but they could all become Christians regardless of their nationality or religion.
Step-by-step explanation:
The people at Pentecost were from all nations, but they were of different religions. Prior to Pentecost, Christianity was primarily seen as a Jewish sect. However, after the influence of St. Paul, most Christians came to believe that the salvation offered by Christ was potentially universal and that anyone, regardless of their nationality or religion, could become a Christian.